﻿namespace Jhong.FunMVCBlog.Admin.Controllers
{
    using Jhong.FunMVC;
    using Jhong.FunMVCBlog.Core.Data;
    using Jhong.FunMVCBlog.Core.Infrastructure;
    using Model;
    using System;
    using System.Drawing;
    using System.Drawing.Imaging;
    using System.IO;

    public class LoginController : BaseController
    {
        public ActionResult Login()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Login(LoginViewModel model)
        {
            var verifyCode = this.GetSession("verifycode") as string;
            if (false == model.VerifyCode.ToUpper().Equals(verifyCode)) return AjaxResult(false, "验证码错误");
            var sysData = new BlogSysData();
            var account = sysData.GetAccount();
            var password = sysData.GetPassword();
            if (false == model.Account.Equals(account) || false == model.Password.GetMD5().Equals(password)) return AjaxResult(false, "帐户名或密码错误");
            this.SetSession("hasLogin", new object());
            if (model.IsRemberMe)
                Response.Cookie.Append("UserName", account.EncryptToken(), new Microsoft.Owin.CookieOptions() { Expires = DateTime.Now.AddMonths(1) });
            return AjaxResult(true);
        }

        public ActionResult Logout()
        {
            this.SetSession("hasLogin", null);
            Response.Cookie.Append("UserName", string.Empty, new Microsoft.Owin.CookieOptions() { Expires = DateTime.Now });
            return RedirectToAction("Login");
        }

        public ActionResult VerifyCode()
        {
            string chkCode = string.Empty;
            //颜色列表，用于验证码、噪线、噪点
            Color[] color = { Color.Black, Color.Red, Color.Blue, Color.Green, Color.Orange, Color.Brown, Color.Brown, Color.DarkBlue };
            //字体列表，用于验证码
            string[] font = { "Times New Roman", "MS Mincho", "Book Antiqua", "Gungsuh", "PMingLiU", "Impact" };
            //验证码的字符集，去掉了一些容易混淆的字符
            char[] character = { '2', '3', '4', '5', '6', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' };
            Random rnd = new Random();
            //生成验证码字符串
            for (int i = 0; i < 4; i++)
            {
                chkCode += character[rnd.Next(character.Length)];
            }
            this.SetSession("verifycode", chkCode);
            Bitmap bmp = new Bitmap(100, 40);
            Graphics g = Graphics.FromImage(bmp);
            g.Clear(Color.White);
            //画噪线
            for (int i = 0; i < 10; i++)
            {
                int x1 = rnd.Next(100);
                int y1 = rnd.Next(40);
                int x2 = rnd.Next(100);
                int y2 = rnd.Next(40);
                Color clr = color[rnd.Next(color.Length)];
                g.DrawLine(new Pen(clr), x1, y1, x2, y2);
            }
            //画验证码字符串
            for (int i = 0; i < chkCode.Length; i++)
            {
                string fnt = font[rnd.Next(font.Length)];
                Font ft = new Font(fnt, 18);
                Color clr = color[rnd.Next(color.Length)];
                g.DrawString(chkCode[i].ToString(), ft, new SolidBrush(clr), (float)i * 20 + 8, (float)8);
            }
            //画噪点
            for (int i = 0; i < 100; i++)
            {
                int x = rnd.Next(bmp.Width);
                int y = rnd.Next(bmp.Height);
                Color clr = color[rnd.Next(color.Length)];
                bmp.SetPixel(x, y, clr);
            }

            //将验证码图片写入内存流，并将其以 "image/Png" 格式输出
            MemoryStream ms = new MemoryStream();
            try
            {
                bmp.Save(ms, ImageFormat.Png);
                Response.ContentType = @"image/Png";
                Response.Write(ms.ToArray());
                //Response.BinaryWrite(ms.ToArray());
            }
            finally
            {
                //显式释放资源
                bmp.Dispose();
                g.Dispose();
            }
            return null;
        }
    }
}